Depends on yer Strain.....Some cannabis requires high heat and low hummidty, while others require med heat and higher hummidity.
I DisAgree with Zandor. If yer in the 60's for extended periods of time yield and quallity will suffer for almost any strain.
MrGuy Reviewed by MrGuy on . Super slowed growth below 70 degrees? So even if your plants are getting everything else they need, if the temperature is below 70 degrees F will their growth slow dramatically? Rating: 5